David Yohannan is a partner in the firm's Washington, D.C. office. Since 1996, he has focused his practice at the firm on intellectual property litigation, prosecution and licensing matters.
Mr. Yohannan represents a wide variety of clients ranging from Fortune 50 companies to individual inventors. He counsels and represents clients in connection with state, federal and administrative litigation involving patent, trademark and consumer protection issues. He counsels and represents applicants for utility and design patent protection before the U.S. Patent and Trademark Office (USPTO), particularly in mechanical, integrated circuitry, semiconductor, display and aeronautic technologies. He also counsels and represents clients, including manufacturers, researchers, service providers and trade associations, on domestic and international licensing matters.
Mr. Yohannan provides clients with opinions of counsel regarding the validity and infringement of patents and trademarks. He counsels and represents applicants for registration of trademarks; counsels and represents clients on unfair competition and trade secret matters; and coordinates the activities of foreign counsel in securing intellectual property protection internationally.
Mr. Yohannan served as lead trial counsel for the following matters:
Blue Spike, LLC v. ACTV8, Inc. (E.D. Tx 2012)
Represent ACTV8 in defense of patent infringement action concerning patents relating to “signal abstracting,” identifying digital information and material, including video, audio, graphics, multimedia, and text based information, encompassing techniques known as “signal fingerprinting,” “acoustic fingerprinting,” or “robust hash functions.” The case remains in its early stages.
Markerts-Alert PYT. Ltd., v. OM Securities, LLC d/b/a Trademonster and Optionmonster Holdings, Inc. (D. Del. 2012)
Represent defendants in patent infringement action accusing online stock and option trading services of infringing a business method patent. The case is in the early pleading stages.
Vidsys, Inc. v. Proximex Corporation (E.D. Pa. 2011)
Declaratory judgment action seeking declaration of non-infringement and invalidity of patent.
Innovative Office Products, Inc. v. Humanscale Corporation (E.D. Pa 2010)
Successful defense and dismissal of patent infringement case with no payment to plaintiff.
Neutral tandem, Inc. v. Peerless Network, LLC, et. al. (N.D. I11.2008)
Successful defense of patent infringement suit including defeating motion for preliminary injunction and obtaining judgment of invalidity of patent. Award of summary judgment affirmed on appeal to U.S. Court of Appeals for the Federal Circuit.
Telarix, Inc v. Vero Systems, LLC (E.D. Va. 2007)
Successful assertion of patent infringement suit. Settlement negotiated licensing defendant under asserted patent.
Stena Rederi AB v. The United States et al. (Fed Cl. 2006)
Successful assertion of Swedish shipping company's patent on ship hull design against the United States resulting in award of $3.2 million to client.
Intelli-Check, Inc. v. Tricom Card Technologies, Inc. et al. (E.D. NY 2003)
Successful defense of patent infringement action resulting in license to client for nominal fee.
Memberships & Associations
American Intellectual Property Law Association
Honors & Awards
Selected as one of The Best Lawyers in America© in the Intellectual Property - Litigation area, 2013-2017.